- Original Message -
From: "Eric Smith"
Sent: Sunday, April 24, 2016 1:38 AM
> On Sat, Apr 23, 2016 at 8:18 PM, dwight wrote:
>> You'd need to decide, LOAD is switch up or
>> LOAD is switch down.
>
> Which still doesn't explain how a toggle
On Sat, Apr 23, 2016 at 8:18 PM, dwight wrote:
> You'd need to decide, LOAD is switch up or
> LOAD is switch down.
Which still doesn't explain how a toggle (not momentary) can be said
to have NC and NO pins. But at this point I'm flogging a dead horse.
> Even if a single
You'd need to decide, LOAD is switch up or
LOAD is switch down.
Even if a single wire, it needs to be debounced.
Dwight
From: cctalk on behalf of Eric Smith
If it was momentary, it would have to be
On Sat, Apr 23, 2016 at 5:09 PM, dwight wrote:
> Lf it were mine to make, it would be a spring return
> momentary SPDT. NC would be ground and NO would be +5V,
> as per the schematic.
> I'm not sure what the manual says about it.
> It is debounced with a jam latch, as per
I think you two are talking different versions of the Elf: Eric is talking
specifically about the Elf 2000 whose circuit design has been modified
considerably from the original version Dwight appears to be referring to.
For my part, when I refurbished a period homebrew implementation (someone's
Lf it were mine to make, it would be a spring return
momentary SPDT. NC would be ground and NO would be +5V,
as per the schematic.
I'm not sure what the manual says about it.
It is debounced with a jam latch, as per schematic.
Tinker Dwight
From: cctalk
On Sat, Apr 23, 2016 at 11:28 AM, dwight wrote:
> I looked at the schematic pdf and it looks right.
> The ground lead is the NC.
It's an SPDT toggle. Neither the NC or NO pin of the switch should be
tied to ground; it's the common pin that's grounded. So for a toggle
switch,
From: "dwight" <dkel...@hotmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk@classiccmp.org>
Sent: Saturday, April 23, 2016 1:28 PM
Subject: Re: COSMAC Elf switch panel using PCBs
I looked at the schematic pdf and it looks right.
The ground lead i
Sent: Friday, April 22, 2016 5:06 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: COSMAC Elf switch panel using PCBs
I built a new Elf switch panel, but this time I used two printed
circuit boards for the switches and the bezel.
The bezel PCB has white soldermask with blac
I built a new Elf switch panel, but this time I used two printed
circuit boards for the switches and the bezel.
The bezel PCB has white soldermask with black silkscreen. The next
revision will have black soldermask with white silkscreen, and the
legend font, weight, and positioning changed to
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